The SUMPRODUCT function allows you to multiply two arrays of numbers together (e.g. Quantity Sold and Price Per Unit) and add the results each individual calculation together. Without the SUMPRODUCT function, you'll find yourself having to create a third column in which you multiply the Quantity by Price for each row, and then find the sum of all the individual formulas. This lesson shows you how to use SUMPRODUCT to do all that with just one formula.
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When you create a new Pivot Table, Excel either uses the source data you selected or automatically selects the data for you. But data changes often, which means you also need to be able to update your pivot tables to reflect the new or changed data. This lesson shows you how to update existing data, and add new data to an Excel pivot table.
There are many scenarios where you may need to use the current date and time in your spreadsheets. You may simply need to display the current date in a spreadsheet report. Or, you may need to perform a calculation that uses the current date or time. This lesson shows you how to enter a formula into a cell in Excel that outputs the current date and/or time, and updates automatically as time passes.
Sometimes you need to count the number of cells in a spreadsheet that contain a value or set of values. The COUNTIF function allows you to do this by counting only those cells in the range that meet the criteria you set. This lesson explains how to use COUNTIF, and provides an example of how you can use it.
This lesson provides a way in Drupal 7 to hide or show an individual menu item based on the location of each visitor. The use case for this example was to show a Shop menu item to visitors in New Zealand and Australia, and hide it for visitors from all other countries.
Word 2010 offers Table Styles to allow you to apply a style to a table in your document.
One of the challenges that can stump you the first time around is setting the color styles for odd/even banding of tables or columns. This lesson describes how to set these on an existing or custom table style.
This lesson introduces the LEN() function, which allows you to calculate the number of characters in a cell. This formula is useful on its own, or can be combined with other text functions such as RIGHT(), LEFT(), MID() and FIND().
Excel's VLOOKUP function is excellent when you want to find a value in a table based on a lookup value. But if your table includes your lookup value multiple times, you'll find that VLOOKUP can't do it. This lesson shows you how to use the INDEX function (plus some other functions) to find all matching values in a list, and return a value from another column in the same row. It also looks at how to do this when you want to return all values which are a partial match (i.e. a wildcard search) to the values in your lookup table.
Sometimes you'll find yourself working with dates in an Excel spreadsheet that have been pasted or imported into Excel from another datasource. When that happens, Excel can treat those dates as text - in other words, they look like dates but don't behave like dates. For example you can't sort by date properly. This lesson looks at several ways you can convert a date which Excel is treating as text into a proper date value in Excel.
If you're using Excel to calculate dates, it is useful to know how to add (or subtract) a certain number of working or business days to a date. This lesson introduces the WORKDAY() function and shows you how to use it.